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authorChris Mason <chris.mason@oracle.com>2007-11-26 16:34:41 -0800
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:03:58 -0400
commit793955bca66c99defdffc857ae6eb7e8431d6bbe (patch)
tree2f8376247033fced7289038b8d82e10a6cc55f22 /fs/btrfs/extent_map.h
parent015a739c7c238768fbfa4eea8ea2ebc1a35e7bb1 (diff)
Btrfs: Limit btree writeback to prevent seeks
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.h')
-rw-r--r--fs/btrfs/extent_map.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index 24ddc8c9346..13c562f7cb6 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -113,6 +113,9 @@ int extent_read_full_page(struct extent_map_tree *tree, struct page *page,
int __init extent_map_init(void);
void __exit extent_map_exit(void);
+u64 count_range_bits(struct extent_map_tree *tree,
+ u64 *start, u64 max_bytes, unsigned long bits);
+
int test_range_bit(struct extent_map_tree *tree, u64 start, u64 end,
int bits, int filled);
int clear_extent_bits(struct extent_map_tree *tree, u64 start, u64 end,